To fix your wireless issue please try this. First hook the router up to the modem via the ethernet cable. Pull the power cable from the modem for 30 seconds then plug it back in and let it sit for a minute or so that way it can sync with the network again. After that pull the power from your router for about 5 seconds and plug it back in, this will force it to communicate with the modem again. After this restart your computer (or run "ipconfig /release" and "ipconfig /renew" on a windows nt/2000/xp machine). this should fix youre wireless communication problems.
Windows 9x, ME, 2000 and XP certified
Wireless Network Specialist